Ceriatone JCM 800 Clones

everytime i listen to these Ceriatone JCM800 clips, i´m blown away how good these amps are. They are true JCM800s but something more is going on there. They sound warmer, the icepicky treble is not there and they have a little more gain dont you think? So what the secret? Better components or transformers or whats the reason? Listen: